KR100770870B1 - Apparatus and method for updating broadcasting service information in digital multimedia broadcasting terminal - Google Patents

Abstract

The present invention relates to an apparatus and method for updating broadcast service information in a digital multimedia broadcasting receiving terminal. The present invention relates to a broadcast service for each ensemble having a good reception sensitivity. A digital multimedia broadcasting module for receiving information and a main control unit for generating the ensemble reception sensitivity check event and updating broadcast service information for each of the received ensembles according to a predetermined condition in a non-digital multimedia broadcasting mode. The present invention has an effect of providing the user with broadcast service information updated immediately without a service scan process when switching from non-DMB mode to DMB mode by updating broadcast service information in non-DMB mode.

Digital multimedia broadcasting receiver terminal, broadcasting service information update

Description

Apparatus and method for updating broadcast service information in digital multimedia broadcasting receiving terminal {APPARATUS AND METHOD FOR UPDATING BROADCASTING SERVICE INFORMATION IN DIGITAL MULTIMEDIA BROADCASTING TERMINAL}

1 is a block diagram of an ensemble used in terrestrial digital multimedia broadcasting according to an embodiment of the present invention.

2 is a block diagram of a transmission frame for terrestrial digital multimedia broadcasting according to an exemplary embodiment of the present invention.

3 illustrates an example of mode switching of a digital multimedia broadcasting receiving terminal according to an exemplary embodiment of the present invention.

4 is a block diagram of a digital multimedia broadcasting receiving terminal according to an embodiment of the present invention.

5 is a flowchart illustrating a process of updating broadcast service information in a digital multimedia broadcasting receiving terminal according to an embodiment of the present invention.

6 is a flowchart illustrating a process of generating an ensemble reception sensitivity check event of a digital multimedia broadcasting reception terminal according to an embodiment of the present invention.

7 is a diagram illustrating a broadcast service information display screen according to an embodiment of the present invention.

The present invention relates to a digital multimedia broadcasting receiver terminal, and more particularly, to an apparatus and method for updating broadcast service information in a digital multimedia broadcasting receiver terminal (also called a "DMB phone").

Digital multimedia broadcasting (also known as 'DMB') is a broadcasting service that provides users with high quality, high sound quality, and higher service in place of conventional analog broadcasting, and is a satellite digital broadcasting and terrestrial digital broadcasting. It is called.

Among them, terrestrial digital broadcasting is based on DAB (digital audio broadcasting), which is a concept of using multimedia channels for mobile reception using VHF channels 8 and 12, which are currently empty. The broadcast means a combination of a television broadcast, a radio broadcast, and a data broadcast.

In general, terrestrial DMB signals are composed of ensemble units, and one ensemble consists of several services. Each service includes service components. That is, one ensemble includes a plurality of video services, audio services, and data services.

The terrestrial DMB signal is classified into a broadband broadcast signal from a wide area broadcast station providing a broadband broadcast service and a local broadcast signal from a local broadcast station providing a broadcast service for a specific region (ie, a local band). The broadband broadcast signal is provided to a broadband including a plurality of local areas, and the local broadcast signal is provided only to that local area, respectively.

A user may watch a broadband broadcast signal or a local broadcast signal by scanning a digital broadcast channel through a digital multimedia broadcast receiving terminal and selecting a service in an ensemble that can receive the scan result. When watching the digital multimedia broadcasting, the digital multimedia broadcasting receiving terminal must first scan a DMB service that can be received in the region in order to receive and output a predetermined digital broadcasting.

However, when the digital multimedia broadcasting receiving terminal is implemented by adding a digital broadcasting receiving function to a general mobile communication terminal, the digital multimedia broadcasting receiving terminal has a DMB mode using a DMB service and a non-DMB mode (an idle mode, a phone mode, etc.) using no DMB service. Performs a DMB service scan in DMB mode. Therefore, in order to obtain the DMB scan result, it takes a long time to switch the DMB phone to the DMB mode and wait for the scan to complete after requesting the DMB scan.

When the DMB service is scanned, the digital multimedia broadcasting reception terminal may not receive broadcast service information (MCI / SI data) in the ensemble if the ensemble reception sensitivity corresponding to a specific frequency is not good according to the location of the user. In this case, the digital multimedia broadcasting receiving terminal omits the ensemble from the scan result, and the missing ensemble can be obtained only by scanning the DMB service even if the location of the user is changed to improve reception sensitivity. Therefore, even though the reception sensitivity of the ensemble is improved and the broadcasting service information included in the ensemble is able to be received, the digital multimedia broadcasting receiving terminal does not know the broadcasting service information that can be received again unless the scan is performed again. There is a problem that cannot be selected.

In addition, even when the digital multimedia broadcasting receiving terminal scans the DMB service with good reception sensitivity or normally receives broadcast service information in the ensemble, the ensemble service information updated after the DMB service scan time can be obtained only by scanning the DMB service again. Therefore, when the ensemble service information is updated after the DMB service scan, the digital multimedia broadcasting receiver does not know the updated broadcast service information unless the service scan is performed again.

Accordingly, the present invention provides an apparatus and method for updating broadcast service information in a digital multimedia broadcasting receiving terminal that provides broadcast service information immediately when a broadcast service information is obtained by performing a DMB service scan in a non-DMB mode to update broadcast service information. To provide.

In addition, the present invention is to provide a broadcast service information updating apparatus and method in a digital multimedia broadcasting receiving terminal that provides the latest broadcast service information by periodically performing a DMB service scan in the non-DMB mode to update the broadcast service.

In addition, the present invention is to provide a broadcast service information updating apparatus and method in a digital multimedia broadcasting receiving terminal that provides accurate broadcast service information even when a user location is changed by performing a DMB service scan every handover in the non-DMB mode. do.

In order to achieve the above object, the present invention provides an apparatus for updating broadcast service information in a digital multimedia broadcasting receiving terminal, the reception sensitivity of each ensemble being checked according to the occurrence of an ensemble reception sensitivity check event, and each of the ensemble having a good reception sensitivity. A digital multimedia broadcasting module for receiving broadcast service information for the main control unit, and a main control unit for generating the ensemble reception sensitivity check event according to a predetermined condition in a non-digital multimedia broadcasting mode and updating broadcast service information for each of the received ensemble. And a broadcast service information updating device in a digital multimedia broadcasting receiving terminal, characterized in that it comprises a.

The present invention also provides a method for updating broadcast service information in a digital multimedia broadcasting receiving terminal, wherein the ensemble reception sensitivity check event is generated according to a predetermined condition in a non-digital multimedia broadcasting mode, and the ensemble reception sensitivity check event is generated in accordance with a predetermined condition. Checking a reception sensitivity of the ensemble, and receiving and updating broadcast service information for each of the ensemble having good reception sensitivity.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the same components in the drawings are represented by the same reference numerals and symbols as much as possible even if shown in different drawings. In addition, in the following description of the present invention, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a block diagram of an ensemble used in terrestrial digital multimedia broadcasting according to an embodiment of the present invention.

Referring to FIG. 1, an ensemble used in terrestrial digital multimedia broadcasting is allocated to one frequency and includes a plurality of services and service components corresponding to each of the plurality of services. For example, an ensemble labeled "Ensemble No. 1" consists of services such as "Alpha 1 Radio", "Alpha 1 TV", "Beta Radio", and "Alpha 2 Radio". And the ensemble configured as described above is transmitted through the main service channel and the fast information channel of the terrestrial digital multimedia broadcast transmission frame. The primary service channel is a channel for transmitting audio, video and data service components, and is composed of a plurality of sub-channels. The fast information channel is a channel for transmitting information that needs to be quickly received by the digital multimedia broadcasting receiving terminal.

A detailed configuration of a terrestrial digital multimedia broadcast transmission frame including a fast information channel and a main service channel of FIG. 1 is shown in FIG. 2. Referring to FIG. 2, a transmission frame of terrestrial digital broadcasting is composed of a synchronization channel (SC), a fast information channel (FIC), and a main information channel (MIC).

The synchronization channel includes transmission frame synchronization, auto frequency control, channel state estimation, transmitter identification, and the like, and is required for digital multimedia broadcast data transmission. It functions to convey information.

The primary service channel consists of Common Interleaved Frames (CIFs). One common interleave frame is a data unit of 55,296 bits and is transmitted every 24ms. The smallest unit that can be assigned an address in a common interleave frame is a CU (Capacity Unit) and one CU is 64 bits. Several CUs are connected to form one main service channel, which is a basic transmission unit, and the basic transmission unit of the main service channel is called a sub-channel. The main service channel is composed of multiple subchannels, and the subchannels are channels for transmitting audio, video and data service components, and a configuration between the subchannels and the service component is called a multiplex configuration.

The fast information channel is composed of a fast information block (FIB) and functions to deliver control information necessary to interpret the configuration of the main service channel. The key part of the control information is Multiplex Configuration Information (MCI), which contains information about the multiplexing structure and, if necessary, the remultiplexing structure. Other information that may be included in the fast information channel includes service information (SI).

Therefore, when receiving the terrestrial digital multimedia broadcasting transmission frame for each ensemble and analyzing the MCI / SI, broadcast service information, that is, DMB service information can be obtained.

According to an embodiment of the present invention, the apparatus for updating broadcast service information of a digital multimedia receiver terminal receives a terrestrial digital multimedia broadcast transmission frame for each ensemble in a non-DMB mode and updates broadcast service information, that is, DMB service information.

In other words, the apparatus for updating a broadcast service of a digital multimedia reception terminal according to an embodiment of the present invention performs frequency tuning for each ensemble in a non-DMB mode, and receives and analyzes MCI / SI through a fast information channel. The broadcast service updater of the digital multimedia receiver terminal updates the broadcast service information according to the MCI / SI analysis result for each ensemble.

In this case, the broadcast service updating apparatus of the digital multimedia receiving terminal may update the broadcast service information by determining whether the digital multimedia receiving terminal is switched from the DMB mode to the non-DMB mode.

3 is an exemplary diagram of mode switching of a digital multimedia broadcasting receiving terminal according to an exemplary embodiment of the present invention. Referring to FIG. 3, the digital multimedia broadcasting reception terminal according to an embodiment of the present invention has three operation modes such as a phone mode, an idle mode, and a DMB mode. The phone mode is a mode for performing a general mobile phone function, and the idle mode is a mode for stopping the use of some resources when there is no user input for a certain time. The DMB mode is a mode in which a user uses a DMB service.

In the phone mode, if a certain time is exceeded without user input, the device is switched to the idle mode. If the user input event such as a phone event or a key event occurs in the idle mode, the phone mode is switched back to the phone mode. The phone mode and the idle mode are not modes using the DMB service, and in the exemplary embodiment of the present invention, a mode other than the mode using the DMB service is referred to as a non-DMB mode. If there is a DMB key input that requires switching from non-DMB mode to DMB mode, the operation mode is switched from non-DMB mode to DMB mode.If there is an exit key input to stop DMB mode in DMB mode, the operation mode is set to non-DMB mode. The mode is switched.

That is, the broadcast service updating apparatus of the digital multimedia broadcasting receiving terminal according to the embodiment of the present invention determines the operation mode switching as described above and updates the broadcast service information when the operation mode is switched from the DMB mode to the phone mode or the idle mode. .

4 illustrates a digital multimedia broadcasting receiving terminal to which an apparatus for updating digital multimedia broadcasting service information according to an exemplary embodiment of the present invention is applied.

4 is a block diagram of a digital multimedia broadcasting receiving terminal according to an embodiment of the present invention. Referring to FIG. 4, the digital multimedia broadcasting receiver includes a DMB RF unit 402, a DMB broadcast receiver 404, a DMB controller 406, a communication RF unit 412, a mobile communication transceiver 414, and a mobile communication controller. 416, a user input unit 420, a main controller 430, an audio processor 440, a display unit 450, and a memory unit 460.

First, the DMB RF unit 402, the DMB broadcast receiving unit 404, and the DMB control unit 406 may be configured as a DMB module, and the DMB RF unit 402 may be digitally controlled under the control of the DMB control unit 406. Receives a DMB RF signal corresponding to a specific frequency from multimedia broadcasting stations.

The DMB broadcast receiving unit 404 converts the received DMB RF signal into digital broadcast data, and includes a main service channel including broadcast data for each subchannel (that is, for each video channel, audio channel, and data channel) from the digital broadcast data. MSC) and a fast information channel (FIC) representing the information of the primary service channel.

The DMB control unit 406 sets the frequency of the DMB RF unit 402 to the specific frequency according to the digital broadcast request from the user in the DMB mode so that the user can receive the desired digital broadcast data. In addition, the DMB control unit 406 parses the broadcast data for each sub-channel of the main service channel separated from the received digital multimedia broadcasting data and provides the same to the main control unit 430 so that the digital multimedia broadcasting can be output. In addition, the DMB control unit 406 reads the fast information channel separated from the received digital broadcast data and provides the MCI / SI corresponding to the broadcast service information to the main control unit 430. In addition, the DMB control unit 406 checks the reception sensitivity of each ensemble while tuning the frequency of the DMB RF unit 402 for each ensemble under the control of the main control unit 430 in the non-DMB mode, and the MCI of the ensemble having a good reception sensitivity is provided. / SI is obtained and provided to the main controller 430.

Meanwhile, the communication RF unit 412, the mobile communication transceiver 414, and the mobile communication controller 416 may be configured as mobile communication modules, and the communication RF unit 412 moves under the control of the mobile communication controller 416. Transmit and receive mobile communication RF signals from a communication network.

The mobile communication transceiver 414 converts voice data, text data, video data, and control data into analog signals under the control of the mobile communication controller 416 and transmits and receives them through the communication RF unit 412. The mobile communication controller 416 performs a control for performing a mobile phone function in the phone mode, and performs a control for transmitting and receiving voice data, text data, video data, and control data. In addition, the mobile communication controller 416 determines whether a handover occurs, and when a handover occurs, it informs the main controller 430 that the handover has occurred.

The user input unit 420 may be configured as a keypad having a key matrix structure, and includes a character key, numeric keys, and various function keys to output a key input signal corresponding to a key input by the user to the main controller 430. .

 The main controller 430 controls the overall operation of the digital multimedia broadcasting receiving terminal. In particular, when the operation mode of the digital multimedia broadcasting receiving terminal is switched to the non-DMB mode, the main control unit 430 may provide MCI / SI information on the currently available ensemble according to a predetermined condition. The DMB control unit 406 is controlled to update.

In more detail, when the operation mode of the digital multimedia broadcasting reception terminal is changed to the non-DMB mode, the main controller 430 generates an ensemble reception sensitivity check event according to a predetermined condition in order to update MCI / SI information on the currently available ensemble. .

In this case, the predetermined condition may be whether a predetermined dynamic period or handover occurs. When using a predetermined dynamic period, the main controller 430 compares the reception sensitivity check result for each ensemble with the reception sensitivity for each current ensemble. If the reception sensitivity is changed, the main control unit 430 increases the time until the reception sensitivity check for each ensemble, and if the reception sensitivity is not changed, the main control unit 430 dynamically changes the period while reducing the time until the reception sensitivity check for each ensemble. Raise the sensitivity check event.

On the other hand, when using the handover occurs, the main controller 430 generates an ensemble reception sensitivity check event when the handover occurs as a result of the detection of the handover by the mobile communication controller 416.

When the ensemble reception sensitivity check event occurs, the main controller 430 determines the reception sensitivity checking order according to the previous ensemble reception sensitivity and MCI / SI reception, and checks the reception sensitivity for each ensemble according to the order. Control to update the MCI / SI information.

As described above, when the MCI / SI information for each ensemble is updated in the non-DMB mode and the user is switched to the DMB mode, the main controller 430 immediately displays the updated MCI / SI information through the display 450. To provide.

The memory unit 460 stores various information necessary for controlling the operation of the digital multimedia broadcasting receiving terminal and stores frequency information for each ensemble. In addition, the memory unit 460 stores previous ensemble reception sensitivity and MCI / SI reception so as to determine the order of checking each ensemble reception sensitivity, and stores the updated MCI / SI information in the non-DMB mode and stores the DMB in the non-DMB mode. Allows you to provide updated MCI / SI information immediately when switching to mode.

Hereinafter, a broadcast service update method in a digital multimedia broadcasting reception terminal according to an embodiment of the present invention configured as described above will be described in detail. 5 is a flowchart illustrating a process of updating broadcast service information of a digital multimedia broadcasting receiving terminal according to an embodiment of the present invention.

Referring to FIG. 5, the digital multimedia broadcasting receiver determines mode switching from the DMB mode to the non-DMB mode in step 502. For example, it is determined whether to switch from the DMB mode to the phone mode or the idle mode.

If the operation mode is switched from the DMB mode to the non-DMB mode, the digital multimedia broadcasting receiver generates an ensemble reception sensitivity check event according to a predetermined condition in step 504. The ensemble reception sensitivity check event is an event for checking the reception sensitivity of each ensemble while tuning a frequency for each ensemble, and a predetermined condition for generating an ensemble reception sensitivity check event can be set in various ways.

An embodiment of the present invention will be described with an example of generating an ensemble check event according to whether a dynamic period or a handover occurs. FIG. 6 is a diagram illustrating a specific embodiment of the occurrence of an ensemble reception sensitivity check event of the digital multimedia broadcasting reception terminal.

6 is a flowchart illustrating a process of generating an ensemble reception sensitivity check event of a digital multimedia broadcasting reception terminal according to an embodiment of the present invention. Referring to FIG. 6, in step 602, the digital multimedia broadcasting reception terminal determines whether a dynamic period is set or whether a handover is set as a predetermined condition for generating an ensemble reception sensitivity check event.

If the dynamic period is set as a predetermined condition for generating the ensemble reception sensitivity check event, the digital multimedia broadcasting reception terminal analyzes the result of the previous ensemble reception sensitivity check in step 604. In operation 606, the result of comparing the sensitivity of the previous ensemble check with the reception sensitivity of the current ensemble is determined to determine whether the sensitivity of the ensemble has changed.

If the reception sensitivity is changed, the digital multimedia broadcasting reception terminal decreases the ensemble reception sensitivity check period in step 608. That is, the digital multimedia broadcasting reception terminal reduces the time until the next ensemble reception sensitivity check. If the reception sensitivity has not changed, the digital multimedia broadcasting reception terminal increases the ensemble reception sensitivity check period in step 610. That is, the digital multimedia broadcasting reception terminal increases the time until the next ensemble reception sensitivity check.

Then, in step 612, the digital broadcast receiving terminal generates an ensemble reception sensitivity check event according to the ensemble reception sensitivity check period.

On the other hand, if it is set whether or not a handover occurs under a predetermined condition for generating an ensemble reception sensitivity check event, the digital multimedia broadcasting reception terminal checks whether a handover occurs in step 624.

If the handover occurs, the digital multimedia broadcasting receiver generates an ensemble reception sensitivity check event in step 626 according to the handover occurrence.

Meanwhile, when an ensemble reception sensitivity check event occurs, the digital multimedia broadcasting reception terminal determines the reception sensitivity checking order according to the previous ensemble reception sensitivity and MCI / SI reception in step 506 of FIG. 5. At this time, the digital multimedia broadcasting receiving terminal determines the reception sensitivity checking order in order from the ensemble having the best reception sensitivity among the ensembles which did not receive the MCI / SI as a result of the previous DMB service scan. The next step is to determine the sensitivity check order in the order of the ensemble that has already received the MCI / SI information.

 After determining the ensemble reception sensitivity check order as described above, the digital multimedia broadcasting reception terminal tunes the reception frequency to the frequency of the ensemble of the first reception sensitivity check order which is the first order in step 508. In operation 510, the digital multimedia broadcasting receiver checks the reception sensitivity of the ensemble.

In operation 512, the digital multimedia broadcasting reception terminal determines whether the reception sensitivity is good. If the reception sensitivity is not good, the digital multimedia broadcasting reception terminal proceeds to step 522.

If the reception sensitivity is good, the digital multimedia broadcasting reception terminal receives MCI / SI of the ensemble and analyzes broadcast service information in step 512. As a result of analyzing the broadcast service information, the digital multimedia broadcasting receiver determines whether the corresponding broadcast service information exists in step 516. If the corresponding broadcast service information exists, the digital multimedia broadcasting receiving terminal compares the broadcast service information analysis result with the existing broadcast service information in step 518 and updates the changed contents. If the corresponding broadcast service information does not exist, the digital multimedia broadcasting receiver adds the analysis result of the broadcast service to the existing broadcast service information in step 520.

In operation 522, the digital multimedia broadcasting reception terminal determines whether an ensemble of the next reception sensitivity check order exists. If there is an ensemble of the next check order, the digital multimedia broadcasting receiver terminal tunes the reception frequency to a frequency corresponding to the ensemble of the next reception sensitivity check order in step 524 and returns to step 510. After repeating steps 510 to 522, if the ensemble of the next reception sensitivity check sequence does not exist in step 522, the process ends.

As described above, the digital multimedia broadcasting receiving terminal updates the MCI / SI for each ensemble in the non-DMB mode and then displays the broadcast service information according to the updated MCI / SI on the display unit 450 when the DMB mode is switched.

7 is an example of a broadcast service information display screen according to an embodiment of the present invention. Referring to FIG. 7, when the digital multimedia broadcasting receiving terminal is switched to the DMB mode, the digital multimedia broadcasting receiving terminal displays the broadcasting service information according to the updated MCI / SI in a pop-up window or an OSD (On Screen Display) method at the bottom of the screen of the display 450.

In the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be determined by the equivalent of claims and claims.

As described above, the present invention has an effect of providing the broadcast service information updated to the user immediately without the service scan process when switching from the non-DMB mode to the DMB mode by updating the broadcast service information in the non-DMB mode.

In addition, the present invention can reduce the power consumption of the DMB service scan by reducing the number of DMB service scans when the broadcast service is not updated by performing the DMB service scan according to the dynamic period in the non-DMB mode.

In addition, the present invention has the effect of updating the broadcast service information according to the user location change by updating the broadcast service when the handover occurs in the non-DMB mode.

Claims (18)

A broadcast service information updating device in a digital multimedia broadcasting receiving terminal, A mobile communication module performing a mobile communication function and informing of a handover occurrence; Ensemble reception sensitivity check Digital multimedia broadcasting module for checking the reception sensitivity for each ensemble according to the occurrence of the event, and receiving the broadcast service information for each of the ensembles with good reception sensitivity; And a main controller for generating the ensemble reception sensitivity check event and updating broadcast service information for each of the received ensemble when the handover occurs in the non-digital multimedia broadcasting mode. Broadcast service information updating device. The method of claim 1, And a display unit for displaying the updated broadcast service information when the non-digital multimedia broadcasting mode is switched from the non-digital multimedia broadcasting mode to the digital multimedia broadcasting mode. The method of claim 1, And the non-digital multimedia broadcasting mode is a phone mode or an idle mode. delete delete delete The method of claim 2, And the display unit displays the updated broadcast service information in any one of a pop-up window method and an on-screen display (OSD) method. A method for updating broadcast service information in a digital multimedia broadcasting receiving terminal, Detecting a handover occurrence in a non-digital multimedia broadcasting mode and generating the ensemble reception sensitivity check event according to the handover; A second process of checking reception sensitivity of each ensemble according to the ensemble reception sensitivity checking event occurrence; And a third process of receiving and updating broadcast service information for each of the ensembles having good reception sensitivity. The method of claim 8, And a fourth process of displaying the updated broadcast service information when the non-digital multimedia broadcasting mode is switched from the non-digital multimedia broadcasting mode to the digital multimedia broadcasting mode. The method of claim 8, And the non-digital multimedia broadcasting mode is a phone mode or an idle mode. delete delete delete The method of claim 8, And the digital broadcast receiving terminal displays the updated broadcast service information in any one of a pop-up window method and an on screen display (OSD) method. The method of claim 8, wherein the second process, Determining a reception sensitivity checking order according to whether a previous ensemble reception sensitivity, multiplexing configuration information (MCI), and service information (SI) are received; Checking a reception sensitivity of the ensemble by tuning to a frequency of an ensemble of a first reception sensitivity check order, which is a first order of the reception sensitivity check orders; Determining whether the reception sensitivity of the ensemble is good; If the reception sensitivity is good, receiving multiplexing configuration information (MCI) and service information (SI) of the ensemble and analyzing broadcast service information to determine whether the corresponding broadcast service information exists. A method of updating broadcast service information in a digital multimedia broadcasting receiving terminal. The method of claim 15, wherein the third process, And updating the changed contents by comparing the broadcast service information analysis result with previously stored broadcast service information when the corresponding broadcast service information exists. The method of claim 15, And if the reception sensitivity of the ensemble of the first reception sensitivity check order is not good, determining whether an ensemble of the next reception sensitivity check order exists. The method of claim 15, wherein the third process, And if the corresponding broadcast service information does not exist, adding the broadcast service analysis result to the pre-stored broadcast service information.

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